Adjustable shore



Jan. 19, 1926.

G. B. BOSCO ADJUSTABLE SHORE Filed Jan. 30, 1924 Patented Jan. 19, 1926.

ononea VB. Bosco, or cnroaoo, ILLINOIS.

ADJUSTABLE SHORE Application filed January 30, 1924. Serial No. 689,419.

To all whom it may concern:

Be it known thatLGnonon B. Bosoo, a citizen of the United States of America, and a residentof Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Adjustable Shores, of which the following is a specification.

The main objects of this invention are to provide an improved form of adjustable shore; to provide improved means for quickly obtaining a rough adjustment of approximately the correct length and subsequently obtaining a fine adjustment; to provide a shore which is readily collapsible; to provide improved means for locking the separate 1; arts of the shore together so that, when the shore is repeatedly used for work of uniform requirements, it may, if desired, be transported without disturbing the rough adjustment; to provide an improved shore of this kind which is especially adapted for use in temporarilysupporting concrete floor forms; and to provide a device of this kind which is easy-and certain in operation so that it may be used even by unskilled labor.

An illustrative embodiment of this invention is shown in the accompanying drawings, wherein Flgure 1 is a front elevationof the shore, partly broken away for the sake of clearness.

Fig. 2 is a side elevation of the same, taken from the right ,of Figure 1 and partly broken away.

Fig. 3 is an enlarged transverse section, taken on the line 3-3 of Figure 1.

Fig. 4 is an enlarged detail in elevation, showing the wedges for obtaining the fine adjustment of the shore.

Fig. 5 is a transverse section, taken on the line 55 of Fig. 4;

Fig. 6 .is a fragmentary detail, in section, of the lower part of the shore, showing the relative positions of the wedges when the shore is collapsed.

Fig. 7 is a sectional detail showing a I modification of the means for locking the upper post to the frame.

Fig. 8 is a detail, partly in section, showing a modification of the means for locking the lower post to the frame.

The majority of adjustable shores heretofore in use involve either a screw jack or a rotatable cam for relatively shifting the adj ustable parts to expand or contract theshore.

Such constructions are not entirely satisfactory for the reason that the operating mechanism requires oilin and is liable to be rendered inoperative y being clogged with concrete when the shore is used in concrete construction work. Moreover, such devices are expensive to manufacture and generally require a special tool for their operation.

These disadvantages of prior devioes are overcome by the present invention which, in the specific embodiment herein illustrated, 1S applied to a shore wherein the posts are connected together by an improved form of frame having means for supporting one of v the posts in various positions along said frame for obtaining a rough adjustment of the shore. A fine adjustment is obtained by an improved form and arrangement of wedges which bear between the frame and the other post. With this improved construction, the device may be finally adjusted by tapping one or both of the wedges, and it may be quickly 'colla sed by a single tap of the hammer on one o the wedges. In the construction herein shown, improved means is also provided for locking the separate parts of the shore in their assembled relation, so as to permit the device to be transported in either its collapsed or its roughly adjusted position.

As illustrated the shore comprises a pair of posts 1 and 2, and a frame structure 3 adjustably supported on the post 1 by means of wedges 4, and which in turn support the post 2 by a pin 5 which is adjustable to various positions along said frame for obtaining a rough adjustment of the shore prior to the final exact setting obtained by the expansion and contraction of the wedges.

The posts '1; and 2 are slidably arranged within the frame 3, and project beyond the opposite ends thereof. When the shore is used in an upright position, the post 1 forms the base on which the frame 3 is supported,

and the post 2 forms the support for the.

work, not shown. The posts 1 and 2 are preferably timbers of standard thickness, to which the usual braces, not shown, may be readily nailed if desired. If desired, the bas 1 may also be nailed to the floor, after the shore has been finally adjusted, to secure the device against lateral slippage. Mounted on the inner ends of the posts 1 and 2, are bearing plates 6, which are secured thereto by rivets 7 or other suitable fastening means.

In the specific construction herein shown,

- the frame 3 comprises a pairv of channel members 8, which are arranged-in opposed 1'613111011 so as to form gui eways for the posts 1 and 2. The channel members 8 are rigidly secured together in Spaced relation by collars 9, which embrace the frame at the .ends thereof, and plates 10 located mtermediate its ends. The plates 10 are staggored, as shown in Fig. 2,v so as not to nterfere with the raising of the post 2, which is" generally accomplished by inserting the operators hand. through the space 11 between the channel members.

Extending through the channelmembers 8 and spaced apart longitudinally thereof,

' is a plurality of apertures 12, arranged to receive the in 5, which is thereb adjustable to V8I10l1SPOSltl0I1S along t e frame.

for obtaining the rough adjustment of the shore. The pin 5 is provided with a handle 13 at one end thereof, and is threaded at its .other'end to receive a nut 14. Also formed in the channel members 8, is a pair 'of slots 15 arranged in opposed relation to form an o ening for receivmg the wedges 4.

The wedges 4 are formed so as to P I0V1d6 "coacting inclined cam faces 16, and substantially parallel edges 17. The edges 17 bear against the bearing plate 6 ofv the -post'1,'and shoulders 18 formed at the upper ends of the slots 15, so that by driving one or both of the wedges-mwardly the post I land frame 3 are relatively shifted to exv of. a locking key arranged in various positions along the cam *pand the shore. This construction and arrangement of parts permits a very fine adjustment of the shore after the rough adjustment has been made by the pm 5. In order to secure the wedges 4 against slip age after the shore has been set up, the cam aces 16 are transversely grooved soas to be adapted to form keyways for the reception 19. The grooves may be faces 16, but the arrangement shown in Fig.

4 has been found preferable. In this construction, one of the wedges is provided with only two grooves 20 adjacent eachend of the cam face 16,' whereas the other wedge is provided with a series of grooves 21 adjacent each end thereof. Either one of the grooves 20 is adapted to register with any.

one of the grooves 21 in the opposed series. Asclearly shown in Fig. 4, the grooves 20 are differentially spaced with respect tothe grooves 21, so as to permit an adjustment I of the wedges different than the spaces between the grooves 21. Mounted on opposite sides of the wedges, are shoulders 22 arrangedto coactwith the inner faces of the channel members 8 for securing the wedges against removal from the frame.

' Referring to Figures 1 and 2, the improved means for locking the posts 1 *and 2.

to the frame 3 so as to permit the device to be transported in either its collapsed or roughly adjusted uposition, comprises a air;

-shaped straps 23 an 24 of substantially embracing the ends of the posts 1 and 2 respectively and securedthereto by rivets 25 or other suitable fastening means. The strap 23 straddles the wedges 4'and pases over a sleeve 26 mounted on a pin 27 extending through the frame3. The sleeve 26 secures the post 1 against removal from, the

frame 3 and also serves as a spacer and In the modification shown a Fig.7, the

stra 24 is omitted and the bearing plate 6 o the post 2 is provided with a downwardly extending lug-, 24.1 having an aperture 24.2 for receiving the locking pin 5.

In operation, an ap roximate length of the shore is obtained by suitably locating the pin 5 in the frame 3. The final exact setting is made by driving one or both of the wedges 4 inwardly the desired distance and then inserting'the key 19 into the keyway formed by the two registering grooves I in the cam faces 16.. Totake down the shore,

the key 19 is removed and the wedges 4 may then be loosened bythe blow'of a hammer or other suitable tool. To collapse the shore, the pin 5 is removed and inserted into the lowermost aperture '12 for locking the post 2 in its innermost positionpa 1t 15 fre- In concrete construction work, quently desirableto use the same shores repeatedly for workof uniform requirements.

or instance, in building the so-calic' typ'-- cal. floors, which are-of uniform height, the shoresare removed from one floor-as soon 1 as the concrete has properly set, and are then set up on another floor. Heretofore it has been necessary to-readjust the shores'eachv "time they are set up. With the present constructiomthe pin 5 locks the post 2-to the frame 3 sothat, ifdesired," the shore may be transported from one job to another without disturbing the rough adjustment.

Although'but one specific embodiment of this invention- .has been herein shown and described, it will be understood that numerous details of the construction shown may be.altered or omitted without departing from the spirit ofthis invention as de-" fined by the following claim.

I claim:

An adjustable shore comprising a hollow upright frame having an opening extending transversely therethrough, a pin extendng transversely through said frame above said opening, a post telescopically arranged in the lower end of said frame and having its upper end located adjacent said opening, a substantially U-shaped strap mounted on said post and extending around said in for securing said post agalnst withdrawa from said frame, a pair of coacting wedges ex- 110 tending into said opening from opposite sides of said frame and arranged to coact with said frame and post for expanding the shore, and shoulders on said wedges arran ed to coact with said frame to secure sai wedges against withdrawal from said 15 frame.

Signed at Chicago this 28 day of January, 1924.

GEORGE B. nosco. 

